/*
 * MIT License
 *
 * Copyright (c) 2020 wen.gu <454727014@qq.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/******************************************************************************
 * Name: dog_micro_service.h
 *
 * Purpose: micro service model implementation for puppy dog
 *
 * Developer:
 *   wen.gu , 2020-08-19
 *
 * TODO:
 *
 ******************************************************************************/

/******************************************************************************
 **    INCLUDES
 ******************************************************************************/
#ifndef __DOG_MICRO_SERVICE_H__
#define __DOG_MICRO_SERVICE_H__
#include <functional>
#include <memory>

#include "dog_component.h"
#include "dog_errors.h"
#include "dog_json.h"
#include "service/dog_srv_common.h"

/******************************************************************************
 **    MACROS
 ******************************************************************************/
#define MICRO_SRV_COMP_TYPE "_MicroSrv_" 

/******************************************************************************
 **    TYPE DEFINITIONS
 ******************************************************************************/
namespace dog
{
/**parameter: [1]: method name, [2]: method param, [3]: method reply
* return: DogErrc(the component of CommunicationPortService will
*         convert DogErrc to Value& reply)
*/
using ServiceMethodHandler = std::function<DogErrc(const std::string&, const Value&, Value&)>;

/**parameter: [1]: signal name, [2]: signal content */
using SergiceSignalHandler = std::function<void(const std::string&, const Value&)>;

struct MicroSrvCreateParam: public ComponentCreateParam
{
    std::string name = ""; /** the name of current micro service */
    EXTEND_COMP_CREATE_PARAM(MicroSrvCreateParam, MICRO_SRV_COMP_TYPE)
};
/******************************************************************************
 **    CLASSES/FUNCTIONS DEFINITIONS
 ******************************************************************************/

class DOG_CLASS MicroService : public Component
{
public:
    MicroService(const std::string& name, const std::string& version);
    virtual ~MicroService();
public:
    virtual void registerMehotds(ServiceMethodMap& methodMap) = 0; /** micro service register his methods */


    virtual void setMethodHandler(ServiceMethodHandler  handler);
    virtual void setSignalHandler(SergiceSignalHandler handler);

    virtual DogErrc start();
    virtual DogErrc stop();

protected: /** use only for sub class( micro service component)*/
    virtual DogErrc registerMethod(ServiceMethodMap& methodMap, const std::string& name, ServiceMethod method);

    /** async */
    virtual void emitSignal(const std::string& name, const Value& value);

    /** do method call between micro services register in same container */
    virtual DogErrc invoke(const std::string& strMethod, const Value& param, Value& reply);
private:
    class impl;
    std::unique_ptr<impl> mImpl;
};
} /** namespace dog */

#endif /** !__DOG_MICRO_SERVICE_H__ */

